Valve gear



S. K. BROWN.

vAL'vE GEAR.

APPLICATION FILED 001.29. |919.

Patented Nov. 28, 1922.

4 SHEETS-SHEET 2.

l* maf INVENTOR.

I ATTORNEYS.

S. K. BRUWN.

VALVE GEAR. APPucmon man amaze. 191s.

Patented Nov. 28, 1922.

4 SHEETS-SHEET 3.

l N VEN TOR.

fwf/ ATTORNEYS f S. K. BROWN.

VALVE GEAR.

APPLICATION FILED 0CT.29.1919.

Patented Nov. 28, 1922.

A SHEETS-SHEET 4.

I N VEN TOR.

ATTRNEYS Patented Nov. 28, 1922.

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' Application led october 29, 19119, Serial No. 334,219.

To ail whom it may concern:

Be it known that I, SPENCER K. BROWN, a citizen of ythe United States, residing at Syracuse. in the county of Onondaga and State of New York, have invented a certain new and useful Valve Gear, of which the following is a specification.

This invention relates to a valve mechanism, and especially a valve mechanism applicable for use in surface finishing machines of the type set forth in my Patent No. 1,276,167. issued August 20, 1918, and hasfor its object a particu arl simple and eficient synchronizing means or the valve mechanism which is especially simple in construction. and highly efficient and'durable in use and further which cannot get out of order.

The invention consists' in the combinations and constructions hereinafter set forth and claimed.

In describing this invention reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views. y

Figure 1 is a side elevation, artly 1n section, of a surface finishing mac ine embodyin my invention.

igure 2 is a plan view thereof.

Figure 3 is a longitudinal sectional view on line 3 3, Fig. 1.

Figure 4 is a vertical sectional view on line 4-4, Fig. 1.

Figure 5 is an end elevation of arts seen in Fig. 2, the gear case cover eing removed. Y

Figure 6 is an enlarged sectional view, partly in elevation on lines 6 6, Fig. 3i

Figure 7 is a sectional view on line 7 7,

Fig: 1.

igure 8 is a plan view of parts seen in Fig.

Fi re 9 is a plan view yof parts seen in Fig. gilthe top plate being removed.

Figure 10 is a sectional view on line Viii-10, Fig. 7.

Figure 11 is a face view looking to the right in Fig. 7.

Figure -12 is an enlarged sectional view through the operating valve.

Figure 13 is a detail view of the valve piece shown in Fig. 12.

A This invention comprises oppositely movable reciprocat' members, means as a valve for controlling t e actuation of said members, the valve including a shiftable part, the 'members having means for alternately engaging said part to shift the same and synchronizing mechanism operated by the reciprocating members 4 movable under the front part of the machine, the pistons being shown as provided with piston rods 5 which are connected to carriages 7 movable along guides and forming part ofthe members 4, andto which rubbers 8 are connected by universal joints. These carriages and rubbers may be of an suitable form, size and construction, as s own in my atent referred to. The carriages 7 are movable along suitable guides or ways 9, Figs. 4 and 6 which are shown as having lengthwise grooves in their side edges in which slide flanges 10 provided on the carriages 7.

During the reciprocation of the pistons which reciprocate oppositely to each other, the members 7 are moved therewith along the guides 9. The pistons are actuated by any suitable motive Huid as compressed air and the flow of the iuid is automatically controlled or timed by a valve 11 and valve gear to be presently described. This valve may be of any suitable form, size and construction and includes an oscillating valve or distribution piece 12, Fig. 7, mounted on a vertical shaft 13 and having ports 14, 1'5 movable into and out of registration with erts 16, 17, 18 in the head of the valve casin which communicate with the inlet and ex aust pipes l19. These pipes 19 may be arranged in any suitable manner to lead the compressed air alternately into cylinders and to permit the cylinders to exhaust at their opposite ends in alternation with each other.

It is thought that further description is unnecessary.

4The valve piece 12 is oscillated by means of a rocking part 20 mounted on`the lower end of the shaft 13 and having arms extending in opposite directions therefrom into the path of shoulders 21 on the carriages 7 respectvely.

The nchronizing| mechanism, that is, the

mechanism for holding the pistons 2 or the L mounted on the front ends of the worms 22 within the` casing or recess at the front end of the frame, and an idler 26 interposed between the gears 25. The recess in which the gears are located is covered by a plate .27.

In operation, during the reciprocating of the members 4 by the pistons 3, said mem-y bers impart a rotary movement to the Worms, and as these worms are connected together one member ja4,cannot move ahead or la behind the other and hence thg shoul ers 21 engage the rocking part 20 of the valve to reverse the valve at exactly the pro er moment with respect to the positlon of t e pistons in the cylinders.

The iiow of compressed air from the source of supply to the valve *11 is controlled by a manually operated -valve 28 movable in a casing 29 against the spring 30, the valve 28 being operatedby suitable means as a lever 31 pivoted to the frame 1 and operated by a grip lever 32 located near the handle 33 of the frame 1.

In addition to the handle 33 which is located at the rear end of the frame, the frame is also provided with a handle 34 at the frontend thereof. The frame is also provided with a foot 35 at its rear end as in my patent referred to. v

In operation, the operator upon moving the grip lever 32 permits the air to ow through the inlet 36 past the valve 28 and through the outlet pipe 37 into the .valve casing 11 and then the iow is controlled automatically by the valve piece or distributor 12.

During the reciprocation of the pistons the pistons and the rubbing members are held in juxtaposition so that the 'valve is accurately timed by means of the worms 22 and the caring connecting them.

What claim is:

1. The combination with oppositely movable reciprocating members, means for actuating said members `comprising pistons, cylinders in which the pistons are movable, said members being connected to the pistons i respectively, and a valve for kcontrolling the flow of motive fluid to the cylinders, of means movable with said members for controlling the operation of the valve comprising rotatable worms, connected together whereby the motion of one wormV is transmitted to the other, the reciprocating members having parts movable a ong the worms `of the fluid to the sai members to impart rotary movement to the worms, substantially as and for the Vpurpose described.

Y worm is transferred to the other, said members having parts coacting with and movable along the worms respectively to impart a rotary movement thereto, and also having parts movable alternately into engagement with the rocking part on op osite sldes of its axis, substantially as and) for the purpose specified.`

3. The combination of a pair of opposite- 1y movable reciprocating members, means for controlling the actuation of said members including a shiftable part, said members having means for alternately engaging said part and shifting it first in one direct1on and then in the other, synchronizing mechanism between said members including a pair of rotatable elements coacting with the reciprocating members respectively to receive movement therefrom, and means for transferring the motion of one element to the other, substantially as and for the purpose set forth.

4. The combination of a pair of opposite movable reciprocating members, means for controlling the actuation of said members including a shiftable part, said members having means for resectively during the reciprocation of.

alternately engaging r said part and shifting it first in one dir tion and then in the other, synchronizing mechanism between said members includ-` to be ,moved therely, said members being movable under the an automatic valve a pair of frame at for controlling the flow c linders, said valve being mounted on the rame between the ends thereof and including an oscillating valve ront end of the frame,

piece, oppositely extending rock arms connected to the valve piece to oscillate the same. said members having shoulders movable into engagement with the rock arms respectively, worms journaled in the frame above the piston rods, said members being provided with threaded passages ooacting with the Worms for imparting a rotary movement to the worms during the reciprocation thereof, and means for transmitting 10 the movement of one Worm to the other, substantially as and for the purpose described. In testimony whereof, I have hereunto signed m name, at Syracuse in the county of Onon a a, and State of ew York, this l5 1st day of ctober, 1919.

SPENCER K. BROWN. 

